Definition: In this task, you are given an input list A. You need to extract and sort the unique digits used in the list in ascending order. Return -1 if there is no digit in the list.
Input: ['185', '479', 'i', '247', 's', 'x', '247', 'e', '305', 'g', 'c', '101']

0, 1, 2, 3, 4, 5, 7, 8, 9